/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.edu.thu.laud.objectstore.valuegenerator;

import java.util.Properties;

import org.datanucleus.store.valuegenerator.AbstractGenerator;
import org.datanucleus.store.valuegenerator.ValueGenerationBlock;

import com.eaio.uuid.UUID;


/**
 * @author zhuoan
 * 
 */
public class TimeUUIDGenerator extends AbstractGenerator {

	/**
	 * 
	 * @param name
	 * @param props
	 */
	public TimeUUIDGenerator(String name, Properties props) {
		
		super(name, props);
	}

	/**
	 * Method to reserve "size" ValueGenerations to the ValueGenerationBlock.
	 * 
	 * @param size
	 *            The block size
	 * @return The reserved block
	 */
	public ValueGenerationBlock reserveBlock(long size) {
		
		
		UUID[] ids = new UUID[(int) size];
		for (int i = 0; i < size; i++) {
			ids[i] = getIdentifier();
		}
		
		return new ValueGenerationBlock(ids);
	}

	/**
	 * Create a UUID identifier.
	 * 
	 * @return The identifier
	 */
	protected UUID getIdentifier()
    {
		return new UUID();
    }
	
}
